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i8279: Correct keyboard scan rate and logging thereof

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pp: Fix shift/control key polarity (nw)
This commit is contained in:
AJR 2020-02-24 22:22:10 -05:00
parent 516651c298
commit 5d1ebeb648
2 changed files with 6 additions and 6 deletions
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8
src/devices/machine/i8279.cpp
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@ -159,8 +159,8 @@ void i8279_device::device_reset()
// from here is confirmed // from here is confirmed
m_cmd[0] = 8; m_cmd[0] = 8;
m_cmd[1] = 31; m_cmd[1] = 31;
logerror("Initial clock = 3100kHz\n");
timer_adjust(); timer_adjust();
logerror("Initial clock = %.2f kHz\n", m_scanclock / 1000.0);
} }
@ -169,12 +169,12 @@ void i8279_device::timer_adjust()
// Real device runs at about 100kHz internally, clock divider is chosen so that // Real device runs at about 100kHz internally, clock divider is chosen so that
// this is the case. If this is too long, the sensor mode doesn't work correctly. // this is the case. If this is too long, the sensor mode doesn't work correctly.
u8 divider = (m_cmd[1]) ? m_cmd[1] : 1; u8 divider = (m_cmd[1] >= 2) ? m_cmd[1] : 2;
u32 new_clock = clock() / divider; u32 new_clock = clock() / divider;
if (m_scanclock != new_clock) if (m_scanclock != new_clock)
{ {
m_timer->adjust(attotime::from_hz(new_clock), 0, attotime::from_hz(new_clock)); m_timer->adjust(attotime::from_ticks(64, new_clock), 0, attotime::from_ticks(64, new_clock));
m_scanclock = new_clock; m_scanclock = new_clock;
} }
@ -477,8 +477,8 @@ void i8279_device::cmd_w(u8 data)
case 1: case 1:
if (data > 1) if (data > 1)
{ {
logerror("Clock set to %dkHz\n",data*100);
timer_adjust(); timer_adjust();
logerror("Clock set to %.2f kHz\n", m_scanclock / 1000.0);
} }
break; break;
case 2: case 2:

4
src/mame/drivers/pp.cpp
View File

@ -210,13 +210,13 @@ u8 pp_state::kbd_cols_r()
READ_LINE_MEMBER(pp_state::cntl_r) READ_LINE_MEMBER(pp_state::cntl_r)
{ {
// pin 1 of J13 connector // pin 1 of J13 connector
return (m_modifiers->read() & 0x5) != 0x5; return (m_modifiers->read() & 0x5) == 0x5;
} }
READ_LINE_MEMBER(pp_state::shift_r) READ_LINE_MEMBER(pp_state::shift_r)
{ {
// pin 3 of J13 connector // pin 3 of J13 connector
return (m_modifiers->read() & 0x6) != 0x6; return (m_modifiers->read() & 0x6) == 0x6;
} }
WRITE_LINE_MEMBER(pp_state::printer_busy_w) WRITE_LINE_MEMBER(pp_state::printer_busy_w)